I have a water tank on a hill and some lawns to water at the bottom of the hill.
The pipe that connects those two is a 2.5" pipe (yes, really) and when I attach a pressure gauge at the bottom of this 2.5" pipe I see a pressure of about 35 PSI, but when I connect the water tank, the head will be another 10 feet higher (it's a 10 foot tall tank) so ... figure 40 PSI.
I think my flow rate in GPM is extremely high. I tried some calculators online but am not sure if I am getting it right but it appears that I have hundreds and hundreds of GPM. And again, the pressure is 35-40 PSI.
It would be really nice to not have to purchase, install, and maintain a pump for this application, and it seems like I would not need one ... but may I sanity check:
If I connect a sprinkler zone at the bottom, feeding in 35-40 PSI at (god knows what huge GPM) and that sprinkler zone is maybe 200 ft. of 3/4" PVC and say 4 impact sprinkler heads that are designed to run at 30 PSI ... good to go ?
I lose 1-2 PSI on the 200 ft. of 3/4 PVC run ... do I lose any PSI on each of the impact heads (they are in a series) ?
Am I missing something here ?